diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
index b94c661..33c5f6e 100644
--- a/arch/um/drivers/slirp_user.c
+++ b/arch/um/drivers/slirp_user.c
@@ -104,7 +104,7 @@
 	}
 
 	if(err == 0) {
-		printk("slirp_close: process %d has not exited\n");
+		printk("slirp_close: process %d has not exited\n", pri->pid);
 		return;
 	}